Examples
The following code samples show how different types of applications
can use the services provided by Currency Server. You may
also want to check out the Code Examples section, under
Getting Started, in the
Currency
Server documentation. The documentation also covers the
various programming interfaces.
Simple Conversions (VBScript)
In the following VBScript example the Convert method of the Server object
is used to perform simple currency
conversions, both with numerical and with formatted string
results. The ActiveCurrencies collection is then used to build
a list of the available currencies and show their exchange rates
with respect to other currencies. The first two steps of this
example make a hard-coded reference to the USD and
JPY currencies, and will fail if the currencies are not defined in Currency
Server. The second two steps automatically get a list of all
available currencies.
Simple Conversions (C++)
The following is a C++ version of the previous example. It is designed
to use the native COM support of Microsoft Visual C++ version
5.0 or higher. It includes an option to connect via DCOM.
Simple Conversions (C#)
The following is a C# version of the previous examples,
packaged as a Visual Studio 2008 solution. To create the
project in Visual Studio right-click the References folder
in Solution Explorer, then select Add Web Reference. If Add
Web Reference is not available, select Add Service
Reference, then in the Add Service Reference dialog select
Advanced, and in the Service Reference Settings dialog
select Add Web Reference. In the Add Web Reference dialog
enter the web service URL (e.g.
http://localhost/CurrencyServer/CurrencyServer5.asmx) and
select Go. Specify a name for the web reference (e.g.
CurrencyServerService) and select Add Reference.
Adding a Conditional Commission (VBScript)
This example shows how to add a currency exchange commission
(e.g. as applied by banks or credit
card companies) to conversions. Unlike other services which
are sometimes offered online, this procedure recognizes conversions
between currencies which have joined the European Economic and
Monetary Union (EMU), and does not apply any commission when
both currencies belong to the EMU, as these units are both sub-units
of the same currency (the euro), and both banks and credit card
companies usually apply the official conversion rates. (Constant
service fees are not considered by this procedure.)
Active Server Pages (ASP)
This example features a simple ASP page using Currency Server
to provide exchange rate information and currency conversion
functionality.
Widget Skeleton (JavaScript)
This example features a simple HTML page (as shown
here) illustrating
the Currency System Script Library used to obtain
convert-as-you-type functionality. In addition to writing
numerical amounts, currency codes can be typed in the text
(before or after the number) to change the From and To
currencies without using the mouse.
Sample Conversion Filter (VBScript)
This sample code shows how to write a data conversion
filter, which can then
be accessed from the FX Feeds tab of Currency Server Manager
(Add/Edit FX Feed dialog).
To install the filter copy the contents of the archive to
the "Filters" subdirectory of the Currency Server
installation directory.
The "input.txt" file represents a sample set of data in the
format which the filter was designed to process. Make sure that
the Address field points to this file, which can be stored locally
or on the internet.
The "output.ini" file is included in the archive for demonstration
purposes only, and shows a sample output file of the filter.
The actual data output by the filter is normally written to
a temporary location and then deleted by Currency Server.
For debugging purposes, when writing a new filter you may
want to enable full Input and Output logging in the
Notifications tab of Currency Server Manager.
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